The impact on the buoy network on the analysis of the upper ocean thermal structure has been investigated. If all of data is available, huge improvements are noted in the temperature and velocity fields. If data is limited in space, there still impacts on the analysis. Even three data has an impact.
It should be noted that wind stress is assumed to be available at any case, which is a very optimistic assumption. At the same time, salinity is not considered. However, it is realized that the salinity effect is very important in the Western Pacific region. For that purpose, salinity and fresh water flux should be taken into account.
Finally, it is noted that when we added the data at 2N and 2S, the velocity fields along the equator tends to be more deteriorated . This means that our nudging method used in the ODAS should be improved further.
References
Hayes,H.P.,L.J.Mangum,J.Picaut,A.Sumi, and K.Takeuchi, 1991: TOGA-TAO: A moored array for real-time measurements in the tropical Pacific Ocean, Bull. Amer. Met. Soc., 72, 339-347.
Maumoto,Y. and T.Yamagata, 1993 : Simulated seasonal circulation in the Indonesian Seas, J.Geophys. Res. ,98,12,501-12,509.
Kimoto,M.,I.Yoshikawa, and M.Ishii,1996: An ocean data assimilation system for climate monitoring, J.Met.Soc. Japan, in press.
